結果
| 問題 |
No.1209 XOR Into You
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-10-02 10:38:20 |
| 言語 | Java (openjdk 23) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,874 bytes |
| コンパイル時間 | 2,758 ms |
| コンパイル使用メモリ | 79,676 KB |
| 実行使用メモリ | 69,124 KB |
| 最終ジャッジ日時 | 2024-07-20 04:20:18 |
| 合計ジャッジ時間 | 18,981 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 26 WA * 11 |
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.NoSuchElementException;
public class Main {
public static void main(String[] args) {
Main o = new Main();
o.solve();
}
public void solve() {
FastScanner sc = new FastScanner(System.in);
int N = sc.nextInt();
int[] A = new int[N];
int[] B = new int[N];
for (int i = 0; i < N; i++) {
A[i] = sc.nextInt();
}
for (int i = 0; i < N; i++) {
B[i] = sc.nextInt();
}
if ( A[0] != B[0] || A[N - 1] != B[N - 1] ) {
System.out.println(-1);
return;
}
int[] XA = new int[N - 1];
int[] XB = new int[N - 1];
for (int i = 0; i < N - 1; i++) {
XA[i] = A[i] ^ A[i + 1];
XB[i] = B[i] ^ B[i + 1];
}
HashMap<Integer, ArrayDeque<Integer>> map = new HashMap<>();
for (int i = 0; i < N - 1; i++) {
if ( !map.containsKey(XA[i]) ) {
map.put(XA[i], new ArrayDeque<>());
}
map.get(XA[i]).addLast(i);
}
int[] YB = new int[N - 1];
boolean flg = true;
for (int i = 0; i < N - 1; i++) {
if ( map.containsKey(XB[i]) ) {
ArrayDeque<Integer> que = map.get(XB[i]);
if ( que.size() > 0 ) {
YB[i] = que.pollFirst();
} else {
flg = false;
break;
}
} else {
flg = false;
break;
}
}
if ( !flg ) {
System.out.println(-1);
return;
}
int ans = 0;
BinaryIndexedTree tree = new BinaryIndexedTree(N);
for (int i = 0 ; i < N - 1; i++) {
ans += i - tree.sum(YB[i] + 1);
tree.add(YB[i] + 1, 1);
}
System.out.println(ans);
}
class BinaryIndexedTree {
// 個数(max + 1)
int N = 1;
long[] tree = null;
// 1-indexed
BinaryIndexedTree(int max) {
this.N = max + 1;
tree = new long[N];
}
// i番目(1-indexed)の要素にaを加える
void add(int i, long a) {
if ( i == 0 ) return;
while ( i < N ) {
tree[i] += a;
i += i & -i;
}
}
// 1〜i番目(含む)の和
long sum(int i) {
long ret = 0;
if ( i == 0 ) return 0;
while ( i > 0 ) {
ret += tree[i];
i -= (i & -i);
}
return ret;
}
}
class FastScanner {
private final InputStream in;
private final byte[] buf = new byte[1024];
private int ptr = 0;
private int buflen = 0;
FastScanner( InputStream source ) { this.in = source; }
private boolean hasNextByte() {
if ( ptr < buflen ) return true;
else {
ptr = 0;
try { buflen = in.read(buf); } catch (IOException e) { e.printStackTrace(); }
if ( buflen <= 0 ) return false;
}
return true;
}
private int readByte() { if ( hasNextByte() ) return buf[ptr++]; else return -1; }
private boolean isPrintableChar( int c ) { return 33 <= c && c <= 126; }
private boolean isNumeric( int c ) { return '0' <= c && c <= '9'; }
private void skipToNextPrintableChar() { while ( hasNextByte() && !isPrintableChar(buf[ptr]) ) ptr++; }
public boolean hasNext() { skipToNextPrintableChar(); return hasNextByte(); }
public String next() {
if ( !hasNext() ) throw new NoSuchElementException();
StringBuilder ret = new StringBuilder();
int b = readByte();
while ( isPrintableChar(b) ) { ret.appendCodePoint(b); b = readByte(); }
return ret.toString();
}
public long nextLong() {
if ( !hasNext() ) throw new NoSuchElementException();
long ret = 0;
int b = readByte();
boolean negative = false;
if ( b == '-' ) { negative = true; if ( hasNextByte() ) b = readByte(); }
if ( !isNumeric(b) ) throw new NumberFormatException();
while ( true ) {
if ( isNumeric(b) ) ret = ret * 10 + b - '0';
else if ( b == -1 || !isPrintableChar(b) ) return negative ? -ret : ret;
else throw new NumberFormatException();
b = readByte();
}
}
public int nextInt() { return (int)nextLong(); }
public double nextDouble() { return Double.parseDouble(next()); }
}
}